Abstract
We present an algorithm which combines non-rigid image-based registration and conventional position sensing to correct probe-pressure-induced registration errors in freehand three-dimensional(3 D) ultrasound volumes. The local accuracy of image-based registration enables the accurate freehand acquisition of high resolution (> 15MHz) 3D ultrasound data, opening the way for 3D musculoskeletal examinations. External position sensor readings guarantee the large-scale positional accuracy of the data. The algorithm is shown to increase both the clarity and accuracy of reslices through in vivo volumetric data sets.
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